21442412003 has 4 divisors (see below), whose sum is σ = 21443148480. Its totient is φ = 21441675528.

The previous prime is 21442411897. The next prime is 21442412021. The reversal of 21442412003 is 30021424412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21442412003 - 2¹⁶ = 21442346467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21442412003.

It is not an unprimeable number, because it can be changed into a prime (21442412063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322688 + ... + 383421.

It is an arithmetic number, because the mean of its divisors is an integer number (5360787120).

Almost surely, 2^21442412003 is an apocalyptic number.

21442412003 is a deficient number, since it is larger than the sum of its proper divisors (736477).

21442412003 is an equidigital number, since it uses as much as digits as its factorization.

21442412003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736476.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21442412003 its reverse (30021424412), we get a palindrome (51463836415).

The spelling of 21442412003 in words is "twenty-one billion, four hundred forty-two million, four hundred twelve thousand, three".